800K floppy Drive Issues

[Aoresteen]

I dug my 128K/MacPlus out of stoage yesterday. It's been instorage since Dec 2006. Was in good working order when stored.

Good news: Boots, screen is good, battery is fine.

Bad news: Internal drive doesn't eject nor does my external 800K floppy drive.

I cleaned them per this:

http://68kmla.org/wiki/Floppy_drive_lubrication

They are snappy and seem to funtion corrcetly. However, none of them will eject a floppy disk. I have to use a paper clip to get the disks out. I don't hear any eject noise.

What are my next steps?

 

[RickNel]

Since it is affecting both drives, it is most likely a problem with the eject signal or with the lines that send the eject signal to the eject step-motors. The common point for those lines is at the Bourns filter on the logic board, just behind the floppy sockets. I would check for a failed Bourns filter (can be blown by plugging an incompatible external drive or cable with incorrect pinout into the floppy socket). See other recent threads here about that. If it has a Plus logic board, you will have a SWIM chip rather than the IWM chip on the 128 logic board. Worst case would be that controller chip failed.

Another possibility is failing power PSU caps. You might not be getting enough milliamps to drive the step motor. Recapping is also covered exhaustively in many threads here.

Rick